[S390] cio: add missing reprobe loop end statement

Add loop end statement to prevent looping over empty subchannel sets.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/css.c

@@ -451,6 +451,7 @@ static int reprobe_subchannel(struct subchannel_id schid, void *data)
 		break;
 	case -ENXIO:
 	case -ENOMEM:
+	case -EIO:
 		/* These should abort looping */
 		break;
 	default: